Occult gastro-intestinal bleeding in the first two months of life.
D000747:Anemia, Hypochromic / Q000209:etiology*; D000818:Animals; D005243:Feces / Q000032:analysis; D006471:Gastrointestinal Hemorrhage / Q000175:diagnosis*; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007232:Infant, Newborn, Diseases; D008892:Milk; D008895:Milk, Human; D009780:Occult Blood